Re: [go-nuts] Why do I get multiple times the same data?

[Martin Schnabel]

hey,
your playground link does not compile! therefor you get a rot13 version
of the fixed playground link: uggcf://cynl.tbynat.bet/c/_wwLujQtms- ;)

Well who wants to be mean. Just move your buffer declaration into the
for loop or reset it: https://play.golang.org/p/hGovCri02lc

have fun

On 7/28/21 5:11 PM, hyogy hyogy wrote:
> I have recently added a ROT13 logic to a tool of mine.
> This tool connects to a server, from which I run commands on the client.
>
> Here is the code PRE-ROT13:
> https://play.golang.org/p/DAE4cLq3RSx
> Everything works like a charm.
>
> Here is the code POST-ROR13. The difference between them is underlined
> https://play.golang.org/p/DfFJSvuBx05
>
> Both functions handle the output of the commands.
> The ROT13 works fine, but I get the same output multiple time, which
> before did not happen. Infact, if I revert the changes, everything works
> perfectly.
> Example:
>
> */$ whoami/*
> */$ xnyv/*
> */
> /*
> */$ whoami/*
> */$ xnyv/*
> */xnyv/*
> */
> /*
> */$ whoami/*
> */$ xnyv/*
> */xnyv/*
> */xnyv/*
> */
> /*
> */$ whoami/*
> */$ xnyv/*
> */xnyv/*
> */xnyv/*
> */xnyv/*
>
> Why do I get this result? How can I fix it?
> May be fub's fault? It is like if the output get cached somehow, but I
> may be wrong.
>
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[hyogy hyogy]

I am more and more convinced that io.Copy(&fub, &q) is the problem

Il giorno mercoledì 28 luglio 2021 alle 17:11:40 UTC+2 hyogy hyogy ha scritto:

I have recently added a ROT13 logic to a tool of mine.

This tool connects to a server, from which I run commands on the client.

Here is the code PRE-ROT13:

https://play.golang.org/p/DAE4cLq3RSx

Everything works like a charm.

Here is the code POST-ROR13. The difference between them is underlined

https://play.golang.org/p/DfFJSvuBx05

Both functions handle the output of the commands.

The ROT13 works fine, but I get the same output multiple time, which before did not happen. Infact, if I revert the changes, everything works perfectly.

Example:

$ whoami

$ xnyv

$ whoami

$ xnyv

xnyv

$ whoami

$ xnyv

xnyv

xnyv

$ whoami

$ xnyv

xnyv

xnyv

xnyv

[Vadim Berezniker]

fub is declared outside the for loop and io.Copy(&fub, &q) will append to the buffer. 

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[hyogy hyogy]

Thanks!(: Resetting the buffer was the solution! May I ask another tip please?